HBY - Rod Hydraulic Buffer Seal

HBY - Rod Hydraulic Buffer Seal

Type
HBY
Delivery Time
3-7 days
Quality
High-quality
Service
Standard product/Customized product
Brand
DSH
Price
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The HBY hydraulic buffer seal, mounted on the pressure side of the piston rod seal, is designed to improve the durability of the piston rod seal by venting the pressure back to the system side. The main parts of the buffer seal are the static lip, dynamic lip, radial slots, and radial channels. The static lip of the seal is optimized with high flexibility to relieve the interstage pressure. The dynamic lip can minimize the friction and backpressure under high-pressure condition. The radial slots of the buffer seal are designed to reduce the risk of blow-by. The radial channels, a vital element in the whole seal structure, facilitate back-pumping and relieve the pressure.

 

The hydraulic buffer seal is always used together with other rod seals, such as U-cup seal or Y seal, building a “tandem configuration.” The main functions of the buffer seal in the hydraulic system include several aspects. First, it buffers the shock pressure or pressure fluctuations produced by the piston rod of the hydraulic cylinder, easing the backpressure. Second, the seal helps cooling down the temperature, prevents the overheat from transmitting to the seal, and reducing heat generated from the piston rod seal during operation. Third, it reduces the friction resistance caused by the piston rod seal in the hydraulic cylinder. In general, the buffer seal provides adequate lubrication to the piston rod seal or other main seals, and it can enhance the gap extrusion resistance. Thereby, it can extend the durability of the seal element.

 

In harsh conditions, machines or equipment often encounter dramatic swings in pressure, shock loads in temperature or side loads which affect the operation of the hydraulic system. This factor presents a significant and demanding challenge for the buffer seal. Fortunately, DSH Seals can optimize the buffer seals to match customers' specific hydraulic application needs. The buffer seals DSH Seals offers are especially suitable for heavy-duty, agricultural machinery, mobile, and industrial hydraulic applications, including bulldozers, earth moving equipment, cranes, dump trucks, motorized shovels, boom extension cylinders, wheel loaders, etc. HBY seals in DSH Seals are designed referring to the designs and applications of NOK's HBY, DZ's D-10 series.

 

 

 

 

 

Product Features

1. A long service life to minimize maintenance and downtime.

2. No adhesion to the sliding surface.

3. Effective in relieving any pressure built up in the hydraulic system.

4. Excellent abrasion and wear resistance.

5. Providing secondary sealing to reduce the influence of the pressure spikes.

6. Improving the rod seal life.

7. Leak-free performance.

8. Resistant against high temperature and pressure.

9. Low compression set.

10.The unique design of static and dynamic lips for superior performance.

 

 

◆◆ NBR / FKM rubber, POM

 

Material Description NBR, FKM rubber, POM, and so on
Available Color Yelllow, black, and so on
Material Strength This is used in combination with rod packing to absorb the impact and fluctuating pressures at high load, to isolate high-temperature fluids, and to improve the durability of the packing. It has a specially shaped slit at the sliding lip that can leak backpressure and eliminates the pressure between the rod packing and the buffer ring. It is usually used with general petroleum hydraulic fluid oil.
Temperature -55~+120℃
Speed 1m/s
Pressure ≤50MPa
Applied Device Mobile hydraulic equipment / standard cylinder / presses/excavators

 

 

◆◆ Cushion Ring for Rod - HBY

 

 

 Technical Data
Pressure Temperature Sliding speed Medium
Standard ≤50 MPa -55…+120 ℃ ≤1 m/s Minderal oil based hydraulic fluids, barely flammable hydraulic fluids,water,air and others.
Material
Sealing Ring Backup
Standard NBR/PU POM
Pressure 35 Mpa 42 Mpa 50 Mpa
 Max Gap E E≤0.8mm E≤0.4mm E≤0.25mm
Order Example for standard version:
Diameter  d=100mm
Order Code: HBY100*115*6.3
Installation Dimension table based on Metric Size(mm)
 d f8  D+0.2 L+0.2 H
40~190 d+16 6.3 6
200~220 d+21 8 7.7
Order List
Order Number D d H h Order Number D d H h
HBY 0400 40 55.5 6.3 6 HBY 1150 115 131 6.3 6
HBY 0450 45 60.5 6.3 6 HBY 1200 120 136 6.3 6
HBY 0500 50 65.5 6.3 6 HBY 1250 125 141 6.3 6
HBY 0550 55 70.5 6.3 6 HBY 1300 130 146 6.3 6
HBY 0600 60 75.5 6.3 6 HBY 1320 132 148 6.3 6
HBY 0650 65 80.5 6.3 6 HBY 1350 135 151 6.3 6
HBY 0700 70 85.5 6.3 6 HBY 1400 140 156 6.3 6
HBY 0750 75 90.5 6.3 6 HBY 1500 150 166 6.3 6
HYB 0800 80 95.5 6.3 6 HBY 1600 160 176 6.3 6
HBY 0850 85 101 6.3 6 HBY 1700 170 186 6.3 6
HBY 0900 90 106 6.3 6 HBY 1800 180 196 6.3 6
HBY 0950 95 111 6.3 6 HBY 1900 190 206 6.3 6
HBY 1000 100 116 6.3 6 HBY 2000 200 221 8 7.7
HBY 1050 105 121 6.3 6 HBY 2100 210 231 8 7.7
HBY 1100 110 126 6.3 6

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